The auxiliary pump is a dual element hydraulic pump, which has two sets of pumping gears. The seat and cabin's upper floor is removed and also the lift cover lifted away. 675 would have only one tank on the left. ![]() ![]() In my MF 590 the pressure was pipe looped to return, so the auxiliary hydraulics was not in use.įuel tanks under cabin on both sides of tractor body on 699 and 690. This has a pipe, maybe for warning light?Īt least on older models there can be plugs on these outputs and the pump isn't used, if it exists. On side cover also shaft and lever for PTO switch-on and 590 would have a smaller plugged output for measuring PTO stack pressure. The outputs as seen under the central housing. The larger pipe is return and probably the best target to connect extra tank lines. The existing auxiliary pump on MF can be reasoned on pressure and return pipes, that come out through left side round cover. Photos on this page are by Esko Käkönen, I thank him very much for the possibility to use these pics and write the page. ![]() These photos are of Massey Ferguson 699 tractor, but I think my MF 590 with auxiliary pump is very similar inside the central housing, where the hydraulic pumps are. Massey Ferguson auxiliary dual element pump
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